Quiver

2015 Specialized Fatboy SL vs 2013 Salsa Mukluk

The XL is the Salsa Mukluk size closest to your XL Specialized Fatboy SL. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.

What changes on the Salsa Mukluk

Compared with the Specialized Fatboy SL in XL, the Salsa Mukluk in XL places the top of the head tube 5 mm higher and 12 mm further back, relative to the bottom bracket.

Frame stack
+5 mm
Higher front end
Frame reach
−12 mm
Shorter frame reach
Wheelbase
n/a
One of the bikes has no number for this
Head angle
−1.0°
Slacker: calmer steering
Chainstays
n/a
One of the bikes has no number for this

The two frames

2015 Specialized Fatboy SL (XL)The Specialized Fatboy SL frame drawn to scale.J 1154

Only the Specialized Fatboy SL is drawn. The Salsa Mukluk numbers we have for size XL are missing the chainstay length.

Geometry side by side

MeasurementSpecialized Fatboy SL XLSalsa Mukluk XLDifference
Reach458mm446.1−12 mm
Stack629mm634.2+5 mm
Head tube angle70.5°69.5−1.0°
Seat tube angle73°73±0.0°
Effective top tube650mm640−10 mm
Chainstay length455mmnot listed
Wheelbase1154mm1151.8 – 1168.8 mm
BB drop60mm60±0 mm
BB height315mmnot listed
Standover849mm825−24 mm
Seat tube length533mm482.6−50 mm
Head tube length150mm150±0 mm
Fork lengthnot listed468

Differences are the Salsa Mukluk minus the Specialized Fatboy SL. Full charts: 2015 Specialized Fatboy SL, 2013 Salsa Mukluk.

Where each sits in its class

Specialized Fatboy SLSalsa Mukluk

AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted

Each bike is ranked against the other fat bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.

What each ships with

The stock build of each bike's first listed trim. Parts that match are dimmed.

PartSpecialized Fatboy SLSLSalsa Mukluk
ShifterSRAM XX1not listed
DerailleurSRAM XX1not listed
CassetteSRAM XX1not listed
ChainKMC X11Lnot listed
CranksetRace Face Next SLnot listed
TireSpecialized Ground Control Fatnot listed
HubSpecialized Stout XC 135, Specialized Stout XC 190not listed
RimHed Big Dealnot listed
BrakeMagura MT8not listed
StemSpecialized Stout XCnot listed
GripsSpecialized Sip Gripnot listed
SaddleSpecialized Phenom Expertnot listed

Know what is on every bike.

Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.

Explore the app
A Transition Relay build sheet: frame, fork, shock and drivetrainThe Relay’s ride photo galleryThe Relay’s ride spectrum and 2D frame geometryThe garage: five bikes and 99 recorded partsA Specialized Tarmac SL8 road build sheet